#include <header.h>
void fun2(int num){
	printf("i am fun2\n");
}

int main(int argc, char* argv[]){

	signal(2, fun2);
	

	char buf[1 << 10] = {0};
	int res = read(STDIN_FILENO, buf, sizeof buf);
	printf("res=%d\n", res);
	

	

	return 0;
}